Bonus points if the author first mentions a specific trait, physical build, or whatever else halfway through the novel and totally fucks up my mental image.
I don't expect a biology model description for each character, but write me something brief and evocative of how they should look, you fucking dork author. I don't even know how tall she should be, her hair colour, anything. Why are you like this, author?
It's not a massive hassle I guess, but I would rather have something firm to construct the mental image in my brain around, I guess. Plus sometimes context of the scene can paint characters in ways that contradict how I read them, subjectivity.
Again I'm not asking for detailed biology class models or tailor's receipts, just more than literally nothing. I like when I can glean details from the narrative like the strength example you give, but lots of novels don't even have that, y'know?